如何替换富文本框(Windows Phone)中的超链接链接

本文关键字：Phone 超链接 链接 Windows 文本 何替换 替换 | 更新日期: 2023-09-27 18:33:41

我有一条短信：

Download it directly to the <a href="http://itunes.apple.com/fi/app/goalapp/id502461189?ls=1&mt=8">iTunes Store</a> or <a href="https://market.android.com/details?id=com.strikersoft.meramal.se">Android Market</a>. The application is launched for Swedish app store.

我知道如何在富文本框中显示超链接：

http://msdn.microsoft.com/en-us/library/ee681613%28v=vs.95%29.aspx

但是我怎样才能在这个代码中为每个人做这个链接呢？

如何替换富文本框(Windows Phone)中的超链接链接

你应该使用类似 RegEx 的东西或使用像 html agility pack 这样的库来解析字符串。这个扩展方法应该可以工作，让你只调用richTextBlock.SetLinkedText（htmlFragment）;

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Net;
using System.Text.RegularExpressions;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Animation;
using System.Windows.Shapes;
public static class RichTextBlockExtensions
{
    public static void SetLinkedText(this RichTextBlock richTextBlock, string htmlFragment)
    {
        var regEx = new Regex(
            @"'<a's(href'=""|[^'>]+?'shref'="")(?<link>[^""]+)"".*?'>(?<text>.*?)('<'/a'>|$)",
            RegexOptions.IgnoreCase | RegexOptions.Multiline);
        richTextBlock.Blocks.Clear();
        int nextOffset = 0;
        foreach (Match match in regEx.Matches(htmlFragment))
        {
            if (match.Index > nextOffset)
            {
                richTextBlock.AppendText(htmlFragment.Substring(nextOffset, match.Index - nextOffset));
                nextOffset = match.Index + match.Length;
                richTextBlock.AppendLink(match.Groups["text"].Value, new Uri(match.Groups["link"].Value));
            }
            Debug.WriteLine(match.Groups["text"] + ":" + match.Groups["link"]);
        }
        if (nextOffset < htmlFragment.Length)
        {
            richTextBlock.AppendText(htmlFragment.Substring(nextOffset));
        }
    }
    public static void AppendText(this RichTextBlock richTextBlock, string text)
    {
        Paragraph paragraph;
        if (richTextBlock.Blocks.Count == 0 ||
            (paragraph = richTextBlock.Blocks[richTextBlock.Blocks.Count - 1] as Paragraph) == null)
        {
            paragraph = new Paragraph();
            richTextBlock.Blocks.Add(paragraph);
        }
        paragraph.Inlines.Add(new Run { Text = text });
    }
    public static void AppendLink(this RichTextBlock richTextBlock, string text, Uri uri)
    {
        Paragraph paragraph;
        if (richTextBlock.Blocks.Count == 0 ||
            (paragraph = richTextBlock.Blocks[richTextBlock.Blocks.Count - 1] as Paragraph) == null)
        {
            paragraph = new Paragraph();
            richTextBlock.Blocks.Add(paragraph);
        }
        var run = new Run { Text = text };
        var link = new Hyperlink { NavigateUri = uri };
        link.Inlines.Add(run);
        paragraph.Inlines.Add(link);
    }
}
public partial class MainPage : UserControl
{
    public MainPage()
    {
        InitializeComponent();
        this.richTextBlock.SetLinkedText(
            "Download it directly to the <a href='"http://itunes.apple.com/fi/app/goalapp/id502461189?ls=1&mt=8'">iTunes Store</a> or <a href='"https://market.android.com/details?id=com.strikersoft.meramal.se'">Android Market</a>. The application is launched for Swedish app store.");
    }
}
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